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<html lang="en">
<head>
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  <title>Document</title>
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  <script>
    const onInput = throttle(triggerSearch, 500);
    function triggerSearch() {
      console.log('search');
    }
    function throttle(fn, interval) {
      let lastTime;
      return function (...args) {
        if(lastTime) {
          const now = Date.now();
          if((now - lastTime) > interval) {
            lastTime = now;
            fn(...args);
          }
        } else {
          lastTime = Date.now();
          fn(...args);
        }
      }
    }
  </script>
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</html>

